STMicroelectronics STPS2H100

Overview

STPS2H100 from STMicroelectronics is a 100 V, 2 A axial-leaded Schottky rectifier in DO-41 package, optimized for high-frequency DC/DC converters and low-voltage switch-mode power supplies. It delivers VF(max) = 0.70 V at 2 A and 125 °C, supports Tj(max) = 175 °C, and features avalanche-rated PARM = 108 W (tp = 10 µs), enabling robust operation in battery charger and LED lighting circuits.

For engineers reviewing the STPS2H100 datasheet, STPS2H100 pinout, STPS2H100 application, or STPS2H100 equivalent, key selection criteria include forward voltage drop at elevated temperature, reverse leakage at 125 °C, junction-to-ambient thermal resistance (100 °C/W), avalanche energy capability, and DO-41 mechanical compatibility with through-hole PCB layouts.

Technical Context

This Schottky rectifier uses a planar silicon structure with metal-semiconductor junction to achieve negligible switching losses and low forward conduction loss. Its VF vs. IF curve shows 0.65–0.70 V at 2 A and 125 °C, and IR remains ≤0.5 mA at VR = 100 V and Tj = 125 °C.

The device is rated for IFSM = 50 A (10 ms sinusoidal surge) and exhibits specified avalanche capability up to 108 W under 10 µs pulses at Tj = 125 °C. Thermal design relies on Rth(j-a) = 100 °C/W (lead length = 10 mm) and Rth(j-l) = 35 °C/W, supporting stable operation without forced cooling in compact converters.

Key Specifications

Pinout & Package

DO-41 axial package with cathode indicated by a band on the body. Lead spacing and dimensions conform to JEDEC DO-41 standard: body diameter ØB = 2.04–2.71 mm, overall length C ≥25.4 mm, lead diameter ØD = 0.71–0.86 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Compared with SS210H and SB2100, STPS2H100 offers superior thermal robustness (Rth(j-a) = 100 °C/W), lower VF at high temperature, and guaranteed avalanche capability-making it the preferred choice for industrial-grade DC/DC and LED drivers requiring reliability under transient stress.

Availability

STPS2H100 is available at Aetrix Electronics and suitable for LED lighting drivers, battery chargers, and industrial DC/DC converters requiring stable component supply across multi-year production cycles.

Supply support for STPS2H100 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

The STPS series targets high-efficiency power conversion with Schottky rectifiers optimized for low VF, high Tj, and rugged avalanche behavior-specifically engineered for space-constrained, thermally demanding switch-mode applications.

FAQ

What is the maximum allowable lead temperature during soldering for STPS2H100?

The DO-41 package supports wave soldering with peak lead temperature up to 260 °C for 10 seconds, per JEDEC J-STD-020. Hand-soldering must remain below 300 °C for ≤3 seconds to avoid epoxy degradation or bond wire damage. Preheating to 100–150 °C is recommended to minimize thermal shock.

Does STPS2H100 require a heatsink in typical 2 A operation?

No heatsink is required for IF(AV) = 2 A at ambient ≤50 °C with 10 mm lead length and natural convection, given Rth(j-a) = 100 °C/W and power dissipation ≈1.4 W. At 70 °C ambient or higher, PCB copper area ≥250 mm² per lead is advised to maintain Tj < 150 °C.

How does the avalanche rating translate to real-world circuit protection?

The 108 W avalanche rating at tp = 10 µs corresponds to absorbing ~1.08 mJ per pulse. In practice, this protects against flyback voltage spikes up to 120 V with 10 µH leakage inductance and 1.5 A peak current-sufficient for most 24 V input flyback transformers without external clamping.

Is STPS2H100 suitable for reverse polarity protection?

Yes-its 100 V VRRM and low VF make it effective as a series reverse-polarity protector in 24 V systems. With IF(AV) = 2 A and VF ≈ 0.65 V, power loss is 1.3 W at full load, requiring minimal thermal management. Cathode must face the load side to block reverse current.